Hemming machine



- 1,501,747 July 15, 1924 w. CASE I HEMMING macnima Filed Nov. 26 .1920

3 sheets sheet 1 92 o July l 4 w. CASE HEMMINGZMACHINE File V- 26 1920 3 Sheets-Sheet 2 ILUAM CASE &@WMZZ,

w. CASE HEMMING MACHINE Filed Nov. 26 1920 a Sheets- Sheet 3 Patented July 15, 1924.

OFFICE;

wrrmma: case, or sr. Louis, mssouar,

1170., OF NEW ORLEANS, LOUISIANA, A CORPORATION OF LOUISIANA.

HEMMING MACHINE.

Application filed November 26, 1920. Serial 160. 426,873.

To all whom it may concern Be it known that 1, WILLIAM CASE, a citizen of the United States, and resident of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in a Hemming Machine, of which the following is a specification.

This invention relates to a hemming machine. its organization comprises a machine with which a single stitch is sewed through the hem of a long piece of cloth or other ma terial at high speed. The operation of the needle is characterized by piercing the material operated on from its lower face, for. ing a single stitch with a single loop on said lower face and a double loop on the top thereof. The operation of the needle is characterized by having imparted thereto a combined reciprocating and oscillating movement.

A continnouslubricating system is provided for some of the moving parts of the machine.

In the accompanying drawings Fig. 1 represents a front elevation partly broken away of an exemplification of the hemming machine; Fig. 2 shows a section of Fi 1 on the line 2, 2; Fig. 3 shows an enlarged ront view of the looper and needle of the machine in operative position at the end of the top stroke of the needle; Fig. 4 re resents the elements of Fig. 3 with the need e in its middle posi tion going down; Fig. 5 shows the elements of Fig. 3 with the needle at the bottom end of its stroke; Fig. 6 shows the elements of Fig. 3 with the needle in its middle position going up; Fig. 7 is a side view of the loo er and needle at the top end of its stroke; 8 shows a top plan view of a iece-of clot with the stitc made b the mac inc and Fig. 9 is a bottom view of ig. 8.

The machine comprises the base plate upon which is secured the front housing 21 by means of the bolts 22 and the rear housing 23 by means of the bolts 24. A ball bearing race 25 is formed in the front housing 21, for the ball bearings 26. A cap 27 is secured to the front housing 21 over the race 25 by means of the screws 28. A ball bearing race 29 is formed in the rear housing 23 for the ball bearings 30. A ca 31 is secured to the rear housing 23 over the race 29.- A main shaft 33 is ournaled in the ball bearin 26 and 30. Collars 34 and 35 on the she? 33 maintain it in proper lateral position. A gear 36, in this instance a Morse silent chain gear, is fastened to the shaft33. A s ur ear 37, in this instance of raw hide, to the main shaft 33. A second Morse silent chain gear 38 is loose on the main shaft 33. A friction clutch is shown to comprise the male member 40 which is loose on the shaft 33 and connected to the gear 38 and the female member 41. The latter has the annular groove 42, the counter bore 43 and is slidably supported on the shaft 33. A spline 4A is interposed between the member ll and the shaft 33. A bracket 45 extends from the rear housing 23 and has supported thereon the pivot 4L6. A bell crank with the single arm 48 and forked arm 4(9 is pivoted on the pivot 46. Pins 50 on the forked arm 49 engage the groove 42. A bracket 51 extends from the base 20 and has pivoted therein a foot treadle 52 by means of the pivot 53. A link 55 connects the foot treadle 52 with the arm 4.8 of the said bell crank. A spring 56 around the shaft 33 is located in the counter bore 43 and bears between the'male member 40 and female member 41 of the friction clutch. A hand operating wheel 57 is fastened to the main shaft 33. An electric motor 60 has fastened to the armature shaft a silent chain gear 61. A supporting bar 62 is fastened to the housings 21 and 23 and in turn carries the journal bracket 63. A shaft 64 is journaled in the bracket 63 and has fastened thereto the chain gears 65 and 66. A frame 69 has journaled therein the axle 70 and atits upper end are guide openings 71 for cross heads 72 that have journaled therein the axle 73. A driving roller 74: having a sleeve of ems cloth 75 on its circumferential surface is fastened to the axle 7 O. Asilent chain gear 76 is fastened to the axle 70. A silent chain 77 connects the gears 36 and 76. An idler roller 78 is fastened to the axle 73. A silent chain 79 connects the gears 38 and 66 and a silent chain 80 connects the chain gears 61 and 65. A table 81 with an openin 82 to clear the needle bar, to be described, is supported in position in front of the housing ASSIGNOR TO THE E. Y. BENJAMIN GORP-ANY,

is a so astened 21. A chamber A comprises the roof 83, the. I

bottom wall 84, side walls 85 and the detachable bonnet 86 and extends from the front housin 21. A ball bearing race 87 is formed in the out housing 21 for the ball beari 88. A cap 89 is secured to the said front housing21 over the race 87. A ball bea race 90 is formed in the rear housing 28 for through the central guide opening 111.

the ball bearings 91. A cap 92 is secured to the rear housing 23 by means of the screws 93.

An eccentric shaft 91 extends into the chamber A and is journaled in the ball bearings 88 and 91. Collars 941 on the shaft 91 maintain it in proper lateral position. pinion 95 is fastened to the shaft 91 and meshes with the spur gear 37. 1n the chamber A is located the eccentric 96 which is fastened to the eccentric shaft 9 1. An eccentric strap 96 has extending therefrom the needle bar 97. A pair of counterweights 98 are fastened to the shaft 9a. An oil feed nipple 99 is connected with the discharge piping of an oil pump, not' shown, and extends through the bonnet 86 and leads to an oil hole 100 in the shaft 91. The oil hole 100 connects with the oil hole 101 in the eccentric 96, and the latter leads to the junction between said eccentric and its strap to lubricate it. An oil outlet pipe 102 extends from t .e bottom wall 8 1 of the chamber A and connects with the inlet pipe of said oil pump. By this means a continuous lubricating system is provided in the chamber A for the eccentric and its strap. A needle 103 with the eye 104: is supported in the top end of the needle bar 97 and a take up 105 havin the eye 103 is fastened to the needle bar. in the roof 83 of the chamber A is supported a journal bracket 107 with the detachable cap 108. An oscillating guide 109 has formed therewith the trunnions 110 and The trunnions 110 are supported in the journal bracket 107 and the needle bar 97 extends through and is guided in the guide opening 111.

A cap 112 is supported upon the front housing 21 and is detachably connected thereto by means of the bolts 113. A ball race 111 with the ball bearings 115 is formed in the cap 112. A cap 116 is secured to the cap 112 over the race 114:. A looper shaft 118 is iournaled in the ball bearings 115 and has fastened to one end thereof the pinion 119 which meshes with the spur gear 37. A looper 120 with the pointer end 121 and heel 122 is detachably connected to the other end of the looper shaft 118. Collars 123 and 124.- are secured to the looper shaft 118. An upper guide 125 is shown with the flange 126. The latter has an opening for the shaft 118 and is clamped between the front face of the cap 112 and the collar 1241. A lower guide 127 is supported upon and fastened to the bracket 128 and the latter is fastened to the front face of the cap 112.

Abracket 129 has supported thereon a spool 130 for the thread 131 which latter leads the eye 104 of the needle 103.

To operate the hemming machine the electric motor the chain gears 61, and the silent chain 80, rotation is transmitted to the shaft 64,

'the members 139 and 1 10.

tends through 60 is started and by means of neonate The main shaft 33 by means of the chain gears 38, 66 and the silent chain 79 receives rotation from the shaft 64, when the operator bears on the treadle 52 and engages the female member 41 with the male member 40 of the clutch. The rotations of the main A shaft 33 are transmitted to the eccentric shaft 9a through the spur gear 37 and the pinion 95 whereby the needle bar 97 is oscillated and reciprocated through the oscillating guide 109. The looper shaft 118 receives rotation from the shaft 33 through the pinion 119 and spur gear 37. The cloth or other material 135 is located upon the table 81 and is folded and then directed between the guides 125 and 127 to form a hem 136 on its selvedge. The material. with the hem is pulled through said guides by the coaction of the driving roller 7% and the idler roller 78 in the path of the needle 103, by which it is pierced to form a single chain stitch with a pair of loops on the top face of the hem and a single loop on the bottom face of the material the needle entering the cloth through its bottom side.

Referring particularly to Figs. 1 and 3 to 7 it will he noted that for each revolution of the looper 120 one stitch is made in the cloth. The needle oar 97 is oscillated and. re-

ciprocated by means of the eccentric 96 and its strap 96, being guided at its upper portion through the opening 111 of the guide 109. In Fig. 3 the needle 103 has arrived at the end of its upward stroke having pierced the material 135 and its hem 136 and has carried the thread 131 from the previous stitch to form the lower single loop 138 on the bottom side of the material 135. The looper 120 has encircled around its body portion a loop of the thread 131 comprising The member 139 leads from the bottom single loop 138 about to be formed and. the member 140 leads from the bottom single loop 138" previously formed. The pointer end 121 of the looper'120 has just begun to form a new loop one'member of. which is shown at 143. The loopcr 120 rotates in the direction of the arrows shown in Figs. 3 to 6, and the needle 103 when it has lowered to the position of itsmid stroke is shown in Fig. 4. Now a new loop with the members 143 and 144 is supported on the looper 120 and which exthe members 139 and 140. The members 139 and 140 are about to drop from the heel 122 of the loo er. In Fig. 5 the looper 120 has rotated still further and the needle 103 has arrived at the end of its down stroke. The loop having themembers 139 and 140 is in position on the'hem 136 constituting an element of the chain stitch.

ma e a further portion. of its rotation, the =l3o members 143, 144 being still thereon. The

needle 103 has returned to the middle of its up stroke and is ust about at a point to again pierce the material 135 to move to the osition shown in Fi 3.

T e operations described are repeated With every revolution of the loo or 120.

In Fig. 8 the chain stitch is s own with the loops having the members 139 and 140 on the top face of the hem 136, and in Fig. 9 on the bottom face of the material 135 are shown the single loops 138.

Having described my invention what I desire to secure by Letters Patent and claim is:

1. In a machine of the character described the combination of a main shaft, means to rotate the shaft, a second shaft, connections between the shafts and an oscillatin and reciprocating needle bar moving wit the rotations of the second shaft, a needle carried by-the needle bar, a pair of guides with an opening supported in the machine over the needle bar for the material 0 erated upon, the said needle oscillating an reciprocating through the opening in said guides,

piercing said material and forcing a thread therethrough, forming a single loop on the bottom face of the material, a looper shaft journaled in the machine above said guides, a looper havin a pointer end and a heel carried by the EJOPQI shaft, the said looper engaging the thread after it has passed through the material 0 erated upon and forming a double loop f dr the top face of said material.

2. In a machine of the character described the combination of a pair of housings, a rotating main shaft journaled in the housings, a second shaft journaled in the housing, means to rotate the second shaft from the rotations of the first shaft, a chamber formed with one of the housings, the said second shaft extending into said chamber, an eccentric fastened to the second shaft in said' chamber, an eccentric strap for said eccentric, a needle bar with one end carried by said eccentric strap, oscillating means to guide the upper ortion of the needle bar, a needle carried y the upper end of the needle bar to operate on material located above the same and a circulating oil lubricating system connected with said chamber.

n a machine of the character described the combination of a rotating main shaft. a second shaft journaled in the machine, connections between the shafts, a looper shaft journaled in the machine, connections between the main shaft and the looper shaft, a looper connected to the looper shaft, a chamber having a roof formed with the machine and the said second shaft extending into said chamber, an eccentric fastened to the second shaft in said chamber, an eccentric stra for said eccentric, a needle bar carried by the strap and extending'throu h the roof of the chamber, a needle carried by the needle bar, a journal bracket in the roof of the chamber, an oscillating guide having a guide opening supported in said journal bracket and guiding the upper end of the needle bar and a pair of guides to guide a hem in the material operatedv upon above said needle guides having an opening to en bar, said able said needle to pass therethrough, said needle having an eye for a thread which is carried through said material and engaged by said looper after passing therethrough.

a. In a machine of the character described the combination of a rotating main shaft, a rotating eccentric shaft, a rotating looper shaft, the said eccentric shaft extending into a chamber formed with the machine, an cecentric on the eccentric shaft, a strap for the eccentric, a needle bar carried by the strap, an'oscillating guide for the upper portion of the needle bar, a needle having an eye for a thread carried by the needle bar, a looper carried by the looper shaft, a guide having an opening between the looper and the upper end of the needle bar, an oil feed nipp e extending into the chamber and coacting with an opening extending throu h a portion of the eccentric shaft and sa i eccentric to the strap thereof and an oil outlet pipe leading from said chamber.

Signed at Springfield in the county of Green and State of Missouri this 27 day of October A. D. 19200 WM. case. 

